Record Search Query:[Parameters: Topic='BIOSPHERE', Term='AQUATIC ECOSYSTEMS']
UV radiation penetration through sea ice & effects on embryo & larval development, survival & damage of the sea urchin Sterechinus neumayeri, Antarctic Starfish Odontaster validus & Odontaster meridionalis in Ross Sea
UV radiation transmission measurements on sea ice surface and through the annual sea ice into the underlying water column were made during Antarctic spring months (October - November) along with various in situ and lab experiments on embryo and larval development and survival and DNA damage of the sea urchin Sterechinus neumayeri and Antarctic Starfish Odontaster validus and Odontaster ... meridionalis in McMurdo Sound, Ross Sea.
During the 2012/2013 season we conducted experiments on the affects of UV-R, seawater pH and sea temperature on physdiology and embryonic devlopment in sea urchin embryos 1) Experiments examining the affects of reduced seawater pH (ambient, pH 7.8 and 7.6) and sea temperature (-1.9°C to 6°C) on embryonic development. Endpoints include development, morphology, oxidative stress,and intracellular pH.(2) Experiments examining Uv-R on oxidative damage to DNA and devlopment in situ. Spectral irradiances measured at the sea surface and to 5 m.